﻿588 
  REPORT 
  OF 
  COMMISSIONER 
  OP 
  FISH 
  AND 
  FISHERIES. 
  [100] 
  

  

  EXPLANATIONS 
  OF 
  PLATE 
  XXII. 
  

  

  Clupea 
  sapidissima. 
  (The 
  Common 
  Shad.) 
  

  

  Fig. 
  148. 
  Young 
  fish 
  on 
  the 
  third 
  day 
  after 
  hatching, 
  viewed 
  as 
  a 
  transparent 
  object 
  

   to 
  show 
  the 
  extension 
  of 
  the 
  segmental 
  duct 
  forward 
  ; 
  the 
  chorda 
  ch, 
  and 
  liver 
  L. 
  

  

  Fig. 
  149. 
  Young 
  fish 
  immediately 
  after 
  hatching, 
  viewed 
  as 
  an 
  opaque 
  object 
  and 
  

   somewhat 
  obliquely 
  from 
  one 
  side, 
  so 
  as 
  to 
  display 
  the 
  relations 
  of 
  branchial 
  and 
  

   hyomandibular 
  arches, 
  and 
  the 
  position 
  of 
  the 
  pectoral 
  fin. 
  

  

  FlG. 
  150. 
  Young 
  fish 
  seventeen 
  days 
  after 
  hatching, 
  viewed 
  partly 
  as 
  an 
  opaque 
  and 
  

   partly 
  as 
  a 
  transparent 
  object 
  ; 
  py 
  pylorus 
  and 
  rudimentary 
  air-bladder 
  above 
  it 
  ; 
  

   I 
  intestine, 
  filled 
  with 
  the 
  remains 
  of 
  ingested 
  food. 
  The 
  opercula 
  are 
  already 
  

   so 
  far 
  developed 
  as 
  partly 
  to 
  conceal 
  the 
  branchiae. 
  

  

  Fig. 
  151. 
  Young 
  fish 
  five 
  days 
  after 
  hatching, 
  very 
  much 
  enlarged, 
  and 
  viewed 
  as 
  an 
  

   opaque 
  object. 
  Only 
  a 
  slight 
  remnant 
  of 
  the 
  yelk-sack 
  Y 
  remains. 
  

  

  Fig. 
  152. 
  Anterior 
  portion 
  of 
  a 
  young 
  fish 
  on 
  the 
  fourth 
  day. 
  To 
  show 
  the 
  relations 
  

   of 
  the 
  liver 
  L 
  to 
  the 
  yelk 
  Y, 
  over 
  which 
  the 
  portal 
  vessel 
  pv 
  passes 
  forward 
  to 
  

   empty 
  into 
  the 
  venous 
  sinus, 
  in 
  common 
  with 
  the 
  anterior 
  and 
  posterior 
  jugu- 
  

   lars/ 
  and 
  j, 
  la 
  bulbus 
  aortsB, 
  ve 
  ventricle. 
  

  

  Fig. 
  153. 
  View 
  of 
  the 
  fore 
  part 
  of 
  a 
  young 
  fish 
  seventeen 
  days 
  old, 
  from 
  the 
  ventral 
  

   side. 
  

  

  